Deleting Windows Live Mail Contacts In Windows 7 64 bit

There are old contacts in my Live Mail Contacts list which cannot be deleted.  When you highlight them, the Delete icon just turns grey.  If I go on line into my Windows Live Account, and try and delete a contact there, I simply get the message that says, "Some of this contact's info comes from another service. You'll need to delete the contact there to keep it from showing up here."  I don't use other services such as Facebook or Twitter, etc., so how can I delete them there first?  I just want to delete Contacts on my Windows Live Mail Contact list.